A) 3
B) \[2\frac{1}{2}\]
C) 2
D) \[2\frac{1}{4}\]
Correct Answer: A
Solution :
\[72900{{\left( 1+\frac{10}{100} \right)}^{n}}=133100\times {{\left( 1-\frac{10}{100} \right)}^{n}}\] \[\therefore \] \[{{\left( \frac{11}{10} \right)}^{n}}\times {{\left( \frac{10}{9} \right)}^{n}}=\frac{133100}{72900}=\frac{1331}{729}\] \[\therefore \] \[{{\left( \frac{11}{9} \right)}^{n}}={{\left( \frac{11}{9} \right)}^{3}}\] \[\Rightarrow \] \[n=3\]
You need to login to perform this action.
You will be redirected in
3 sec
